tracing: Make ConvertableToTraceFormat move-only scoped_ptr

cc/layers/layer_impl.h

Index: cc/layers/layer_impl.h
diff --git a/cc/layers/layer_impl.h b/cc/layers/layer_impl.h
index b5f2ee25183d93fee72f2c4b3e77dbaf73c61df4..dddb78a01c16ef05db1786cce5c8f41435794010 100644
--- a/cc/layers/layer_impl.h
+++ b/cc/layers/layer_impl.h
@@ -47,7 +47,7 @@
 
 namespace base {
 namespace trace_event {
-class ConvertableToTraceFormat;
+class ConvertableToTraceFormatRefCounted;
 class TracedValue;
 }
 class DictionaryValue;
@@ -620,7 +620,7 @@ class CC_EXPORT LayerImpl : public LayerAnimationValueObserver,
   virtual void RunMicroBenchmark(MicroBenchmarkImpl* benchmark);
 
   virtual void SetDebugInfo(
-      scoped_refptr<base::trace_event::ConvertableToTraceFormat> other);
+      scoped_ptr<base::trace_event::ConvertableToTraceFormat> other);
 
   bool IsDrawnRenderSurfaceLayerListMember() const;
 
@@ -861,7 +861,7 @@ class CC_EXPORT LayerImpl : public LayerAnimationValueObserver,
   DrawProperties draw_properties_;
   PerformanceProperties<LayerImpl> performance_properties_;
 
-  scoped_refptr<base::trace_event::ConvertableToTraceFormat> debug_info_;
+  scoped_ptr<base::trace_event::ConvertableToTraceFormat> debug_info_;
   scoped_ptr<RenderSurfaceImpl> render_surface_;
 
   bool force_render_surface_;